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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
Answer & Solution
Correct Answer:
Option
C
an = a + (n - 1) × d where d = -3, Let an = 0
⇒ 0 = 24 + (n - 1) × -3
⇒ 0 = 24 - 3n + 3
⇒ 3n = 27
⇒ n = 9
⇒ 10th term will be negative (-ve)
⇒ 0 = 24 + (n - 1) × -3
⇒ 0 = 24 - 3n + 3
⇒ 3n = 27
⇒ n = 9
⇒ 10th term will be negative (-ve)
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